Knife-sharpener.



` R. J. DEARBORN.v

` KNIFE SHARPENBR.

APPLIOATION r1LEn Nov.14, 1912.

1,069,768, A1131991115611, Aug.12,1913.

41W WQZQ UNITED STATES VPATENT OFFICE; RICHARD J. DEARBORN, OF BEVERLY,MSSACHUSETTS, `.ASSIGNOR 0F ONE-HALF TO SfLMUEL TARBOX, OF FARMINGTON,MAINE;

KNIFE-SHARPENER.

y To all 'whom it may concern.'

Be it known that I, RICHARD J. DEARBORN, a citizen ofthe United States,and a resident of Beverly, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inKnife-Sharpeners, of which the following is a specification.

This invention relates to a knife sharpener adapted to be secured to atable or other sup- 'port and comprising a base and two pairs ofsharpening disks supported thereby, the

` disks of one pair being smaller than those of number of parts and theexpense of construction.

The invention consists in the improvements which I will now proceed todescribe and claim.

0f the accompanying drawings :-Figure 1 represents a top plan view of asharpener embodying my invention. Fig. 2 represents a side view of thesaine. Fig. 8 represents a section on line 3 3 of Fig. 1. Fig. 4represents a perspective view of the base separated from the sharpeningdisks.

The same reference characters indicate the same parts in all thefigures.

In the drawings, 12 represents a base adapted to be screwed or otherwiseattached to a support such as a table, and provided with two upwardlyprojecting ears 13 arranged substantially at right angles with eachother, each ear being provided with an opening 15 which is preferably acircular aperture. In the opening 15 of each ear is inserted a stud 16which has a head 17 at its outer end, its body portion being providedwith a screw thread terminating at the inner end as shown by Fig. 3.Each stud 16 supports a larger sharpening disk 18 and a smallersharpening disk 19, these disks being preferably made of hardened steeland the sides of the disks forming pronounced angles with the`peripheries thereof. The studs 16 are arranged at right angles withSpecification of Letters Patent.

Application filed November 14, 1912.

Patented Aug. 12,1913. Serial No. 731,286.

each .other `as shown by Fig. 1, andthe disks on said studs aretherefore .arranged in planes at right angles with each other. Thelarger disks 18 are at the outer sides of the ears 13 while the smallerdisks 19 are at the inner sides of said ears, the disks being thusspaced apart. Each larger disk 18 has a central opening which receivesthe corresponding stud 16 without having a screw thread engagementtherewith. Each smaller disk 19 has an internally threaded centralorifice 21 which engages the screw thread of the accompanying stud 16.Each smaller disk 19 therefore constitutes a nut which coperates withthe stud 16 in maintaining a frictional engagement between the adjacentsides of the'disks 18 and 19 and the sides of the accompanying ear 13.By rotating the st-ud 16 in one direction the smaller disk 19 is pressedfirmly against the inner side of the corresponding ear 13 and the innerside of the larger disk 18 is at the same time pressed firmly againstthe outer side of said ear, so that the disks are firmly held againstaccidental rotation. When it is desired to rotatively adjust the disks,the stud 16 is turned outwardly to loosen the disks and permit theirrotative adjustment. Provision is thus made for bringing new portions ofthe peripheries of the disks into operative position, the disks beingarranged as shown by Fig. 3, so that portions of the peripheries of theiarger disks are in close proximity to each other, and portions of thesmaller disks are also in close proximity to each other, so that a knifeblade moved in the path indicated by the line ai, will be acted onsimultaneously by the two pairs of disks.

It will be seen that by utilizing the smaller disks 19 as nuts in themanner described, I reduce the number of parts and the expense ofconstruction to the minimum, no independent nuts being required.

One of the ears 13 is provided with a scissors blade rest 22, having aninclined face 23 which extends outwardly from the periphery of one ofthe larger disks 18, and is arranged at such angle to the portion of theperiphery from which it projects, that one side of a scissors blade maybe guided by the face 23 while the edge of the blade is being sharpenedby the periphery of the disk.

A knife sharpener comprising a base having two ears substantially atright angles with each other, each ear having a stud-receiving opening,headed screwthreaded studs inserted in said openings, and two pairs ofsharpening disks supported by said studs and including larger andsmaller disks separated from each other by said ears, the

gaged with the studs and serving as nuts adapted to frietionally engagethe inner sides of the ears, and hold the larger disks in frictionalengagement with the outer sides of Copies of this patent may berobtainedfor the ears, each stud supporting a larger and a smaller disk, and thedisks on each stud beingnsubstantially. at right angles with the diskson the other stud.

In testimony whereof I have aiixed my signature, in presence of twowitnesses. smaller disks havlng threaded apertures en- 'RICHARD J.DEARBORN.

` YVitnesses: v Y

C. F. BROWN, P. W. PEZZETTI. Y g

ve cents each, by addressingrthe Commissonerrof Patents, Washington, D.C. Y

